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Sterling Metric Converter Slide Rule

This ten-inch, one-sided plastic rule has a yellow base, a white slide, and a transparent indicator. Identical logarithmic scales are on the top and the bottom of the base. Both sides of the slide are marked with pairs of metric and conventional units. On one side, the user can read off conversions between: inches and centimeters; meters and feet; meters and yards; miles and kilometers; square inches and square centimeters; square meters and square feet (times ten); square meters and square yards; and square miles and square kilometers. The other side of the slide permits readings of cubic inches and cubic centimeters (times ten); cubic meters and cubic feet (times ten); cubic meters and cubic yards; liters and quarts; ounces and grams (times ten); kilograms and pounds; metric tons and short tons; and gallons and liters.

Sterling Plastics, a 20th-century manufacturer of drawing instruments for schools, was purchased by Borden Chemical in 1970. Since Sterling stopped making slide rules in 1972, this example of model number 651 was probably one of the last rules produced by the company. The five braces holding together the base of the instrument are also consistent with this date; early Sterling slide rules had only two braces. For instructions, see 1990.0689.03. For a Sterling slide rule with standard scales, see 1988.0807.01.

Comments

Been using slide rules since 1950. Still using slide rule for calculations and I am a Marine Engineer. so the calculations undertaken are not casualThe beauty of a slip stick./ guessing stick ? is its ability to function at all temperatures.Used it once in Quebec to calculate ballast weights to be moved for stability on a ship where all had frozen all the way to the top of mast in layers of ice. but also INCLUDING the my calculator's batteries..Still have three in my desk but now most often used in the STERLING metric convertor. ------- At 78 years old who the hell wants to learn a new system with a Sterling around I can think in one system and calculate in another.

Eck M

Sat, 2015-03-21 18:55

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